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Paul W. Richard
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Journal Articles
The American Biology Teacher (1981) 43 (4): 196–204.
Published: 01 April 1981
Journal Articles
The American Biology Teacher (1970) 32 (8): 504–506.
Published: 01 November 1970
Journal Articles
The American Biology Teacher (1969) 31 (7): 444–447.
Published: 01 October 1969